fix: delete agent 500 error + dynamic personality + deployment guide

- Fix delete agent 500: clean up FK records (agent_llm_logs, permissions,
  schedules, executions, team_members) and unbind goals/tasks before delete
- Remove hardcoded personality templates in Android, replace with dynamic
  system prompt generation from name + description
- Set promptSectionsEnabled=false to bypass PromptComposer for personality
- Add Tencent Cloud Linux deployment guide (Docker Compose)
- Accumulated backend service updates, frontend UI fixes, Android app changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/api/platform_templates.py

@@ -58,9 +58,10 @@ async def create_agent_from_template_v1(
     current_user: User = Depends(get_current_user),
 ):
     try:
-        workflow_config = build_workflow_for_template(
-            body.template_id, body.parameters or {}
-        )
+        params = dict(body.parameters or {})
+        if body.contract_id:
+            params["contract_id"] = body.contract_id
+        workflow_config = build_workflow_for_template(body.template_id, params)
     except ValueError as e:
         raise ValidationError(str(e))